From 2aa4a82499d4becd2284cdb482213d541b8804dd Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 28 Apr 2024 16:29:10 +0200
Subject: Adding upstream version 86.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 image/test/reftest/downscaling/100x100.gif         | Bin 0 -> 956 bytes
 image/test/reftest/downscaling/100x100.jpg         | Bin 0 -> 917 bytes
 image/test/reftest/downscaling/100x100.png         | Bin 0 -> 338 bytes
 image/test/reftest/downscaling/100x32768.gif       | Bin 0 -> 4299 bytes
 image/test/reftest/downscaling/100x32768.jpg       | Bin 0 -> 22041 bytes
 image/test/reftest/downscaling/100x32768.png       | Bin 0 -> 70926 bytes
 image/test/reftest/downscaling/1404366-1.html      |  14 ++
 image/test/reftest/downscaling/1404366-1.ico       | Bin 0 -> 4287 bytes
 image/test/reftest/downscaling/1421191-1.html      |  20 ++
 image/test/reftest/downscaling/1421191-1.png       | Bin 0 -> 92182 bytes
 image/test/reftest/downscaling/32768x100.gif       | Bin 0 -> 4299 bytes
 image/test/reftest/downscaling/32768x100.jpg       | Bin 0 -> 58065 bytes
 image/test/reftest/downscaling/32768x100.png       | Bin 0 -> 13172 bytes
 .../reftest/downscaling/black-border-bottom.png    | Bin 0 -> 4094 bytes
 .../test/reftest/downscaling/black-border-left.png | Bin 0 -> 4176 bytes
 .../test/reftest/downscaling/black-border-rect.svg |   3 +
 .../reftest/downscaling/black-border-right.png     | Bin 0 -> 4097 bytes
 .../test/reftest/downscaling/black-border-top.png  | Bin 0 -> 4144 bytes
 .../reftest/downscaling/bmp-size-16x16-24bpp.png   | Bin 0 -> 879 bytes
 .../reftest/downscaling/downscale-1-bigimage.png   | Bin 0 -> 195 bytes
 .../test/reftest/downscaling/downscale-1-ref.html  |   8 +
 .../reftest/downscaling/downscale-1-smallimage.png | Bin 0 -> 88 bytes
 image/test/reftest/downscaling/downscale-1.html    |  24 +++
 image/test/reftest/downscaling/downscale-16px.html |  28 +++
 image/test/reftest/downscaling/downscale-2a.html   |  31 +++
 image/test/reftest/downscaling/downscale-2b.html   |  31 +++
 image/test/reftest/downscaling/downscale-2c.html   |  31 +++
 image/test/reftest/downscaling/downscale-2d.html   |  31 +++
 image/test/reftest/downscaling/downscale-2e.html   |  31 +++
 image/test/reftest/downscaling/downscale-2f.html   |  31 +++
 .../reftest/downscaling/downscale-32px-ref.html    |   8 +
 image/test/reftest/downscaling/downscale-32px.html |  31 +++
 image/test/reftest/downscaling/downscale-8px.html  |  27 +++
 .../downscaling/downscale-moz-icon-1-ref.html      |  41 ++++
 .../reftest/downscaling/downscale-moz-icon-1.html  |  19 ++
 .../reftest/downscaling/downscale-orient-ref.html  |  24 +++
 .../reftest/downscaling/downscale-orient-ref.png   | Bin 0 -> 146 bytes
 .../test/reftest/downscaling/downscale-orient.html |  24 +++
 image/test/reftest/downscaling/downscale-png.html  |  31 +++
 .../reftest/downscaling/downscale-svg-1-ref.html   |  13 ++
 .../test/reftest/downscaling/downscale-svg-1a.html |   8 +
 .../test/reftest/downscaling/downscale-svg-1b.html |   8 +
 .../test/reftest/downscaling/downscale-svg-1c.html |   8 +
 .../test/reftest/downscaling/downscale-svg-1d.html |   8 +
 .../test/reftest/downscaling/downscale-svg-1e.html |   8 +
 .../test/reftest/downscaling/downscale-svg-1f.html |   8 +
 image/test/reftest/downscaling/ff-0RGB.ico         | Bin 0 -> 4286 bytes
 image/test/reftest/downscaling/ff-0RGB.png         | Bin 0 -> 2515 bytes
 image/test/reftest/downscaling/ff-ARGB.ico         | Bin 0 -> 4286 bytes
 image/test/reftest/downscaling/ff-ARGB.png         | Bin 0 -> 115 bytes
 image/test/reftest/downscaling/huge-1.html         |   9 +
 .../downscaling/image-pre-rotated-90-deg.jpg       | Bin 0 -> 6914 bytes
 .../reftest/downscaling/lime-red-256px-bmp-in.ico  | Bin 0 -> 74814 bytes
 .../reftest/downscaling/lime-red-256px-png-in.ico  | Bin 0 -> 881 bytes
 image/test/reftest/downscaling/lime-red-256px.bmp  | Bin 0 -> 196730 bytes
 image/test/reftest/downscaling/lime-red-256px.gif  | Bin 0 -> 873 bytes
 image/test/reftest/downscaling/lime-red-256px.jpg  | Bin 0 -> 2865 bytes
 image/test/reftest/downscaling/lime-red-256px.png  | Bin 0 -> 568 bytes
 image/test/reftest/downscaling/lime-red-256px.svg  |   5 +
 image/test/reftest/downscaling/lime-red-32px.png   | Bin 0 -> 103 bytes
 image/test/reftest/downscaling/png-interlaced.png  | Bin 0 -> 806 bytes
 image/test/reftest/downscaling/png-normal.png      | Bin 0 -> 421 bytes
 image/test/reftest/downscaling/reftest.list        | 221 +++++++++++++++++++++
 .../downscaling/top-to-bottom-16x16-24bpp.bmp      | Bin 0 -> 822 bytes
 64 files changed, 784 insertions(+)
 create mode 100644 image/test/reftest/downscaling/100x100.gif
 create mode 100644 image/test/reftest/downscaling/100x100.jpg
 create mode 100644 image/test/reftest/downscaling/100x100.png
 create mode 100644 image/test/reftest/downscaling/100x32768.gif
 create mode 100644 image/test/reftest/downscaling/100x32768.jpg
 create mode 100644 image/test/reftest/downscaling/100x32768.png
 create mode 100644 image/test/reftest/downscaling/1404366-1.html
 create mode 100644 image/test/reftest/downscaling/1404366-1.ico
 create mode 100644 image/test/reftest/downscaling/1421191-1.html
 create mode 100644 image/test/reftest/downscaling/1421191-1.png
 create mode 100644 image/test/reftest/downscaling/32768x100.gif
 create mode 100644 image/test/reftest/downscaling/32768x100.jpg
 create mode 100644 image/test/reftest/downscaling/32768x100.png
 create mode 100644 image/test/reftest/downscaling/black-border-bottom.png
 create mode 100644 image/test/reftest/downscaling/black-border-left.png
 create mode 100644 image/test/reftest/downscaling/black-border-rect.svg
 create mode 100644 image/test/reftest/downscaling/black-border-right.png
 create mode 100644 image/test/reftest/downscaling/black-border-top.png
 create mode 100644 image/test/reftest/downscaling/bmp-size-16x16-24bpp.png
 create mode 100644 image/test/reftest/downscaling/downscale-1-bigimage.png
 create mode 100644 image/test/reftest/downscaling/downscale-1-ref.html
 create mode 100644 image/test/reftest/downscaling/downscale-1-smallimage.png
 create mode 100644 image/test/reftest/downscaling/downscale-1.html
 create mode 100644 image/test/reftest/downscaling/downscale-16px.html
 create mode 100644 image/test/reftest/downscaling/downscale-2a.html
 create mode 100644 image/test/reftest/downscaling/downscale-2b.html
 create mode 100644 image/test/reftest/downscaling/downscale-2c.html
 create mode 100644 image/test/reftest/downscaling/downscale-2d.html
 create mode 100644 image/test/reftest/downscaling/downscale-2e.html
 create mode 100644 image/test/reftest/downscaling/downscale-2f.html
 create mode 100644 image/test/reftest/downscaling/downscale-32px-ref.html
 create mode 100644 image/test/reftest/downscaling/downscale-32px.html
 create mode 100644 image/test/reftest/downscaling/downscale-8px.html
 create mode 100644 image/test/reftest/downscaling/downscale-moz-icon-1-ref.html
 create mode 100644 image/test/reftest/downscaling/downscale-moz-icon-1.html
 create mode 100644 image/test/reftest/downscaling/downscale-orient-ref.html
 create mode 100644 image/test/reftest/downscaling/downscale-orient-ref.png
 create mode 100644 image/test/reftest/downscaling/downscale-orient.html
 create mode 100644 image/test/reftest/downscaling/downscale-png.html
 create mode 100644 image/test/reftest/downscaling/downscale-svg-1-ref.html
 create mode 100644 image/test/reftest/downscaling/downscale-svg-1a.html
 create mode 100644 image/test/reftest/downscaling/downscale-svg-1b.html
 create mode 100644 image/test/reftest/downscaling/downscale-svg-1c.html
 create mode 100644 image/test/reftest/downscaling/downscale-svg-1d.html
 create mode 100644 image/test/reftest/downscaling/downscale-svg-1e.html
 create mode 100644 image/test/reftest/downscaling/downscale-svg-1f.html
 create mode 100644 image/test/reftest/downscaling/ff-0RGB.ico
 create mode 100644 image/test/reftest/downscaling/ff-0RGB.png
 create mode 100644 image/test/reftest/downscaling/ff-ARGB.ico
 create mode 100644 image/test/reftest/downscaling/ff-ARGB.png
 create mode 100644 image/test/reftest/downscaling/huge-1.html
 create mode 100644 image/test/reftest/downscaling/image-pre-rotated-90-deg.jpg
 create mode 100644 image/test/reftest/downscaling/lime-red-256px-bmp-in.ico
 create mode 100644 image/test/reftest/downscaling/lime-red-256px-png-in.ico
 create mode 100644 image/test/reftest/downscaling/lime-red-256px.bmp
 create mode 100644 image/test/reftest/downscaling/lime-red-256px.gif
 create mode 100644 image/test/reftest/downscaling/lime-red-256px.jpg
 create mode 100644 image/test/reftest/downscaling/lime-red-256px.png
 create mode 100644 image/test/reftest/downscaling/lime-red-256px.svg
 create mode 100644 image/test/reftest/downscaling/lime-red-32px.png
 create mode 100644 image/test/reftest/downscaling/png-interlaced.png
 create mode 100644 image/test/reftest/downscaling/png-normal.png
 create mode 100644 image/test/reftest/downscaling/reftest.list
 create mode 100644 image/test/reftest/downscaling/top-to-bottom-16x16-24bpp.bmp

(limited to 'image/test/reftest/downscaling')

diff --git a/image/test/reftest/downscaling/100x100.gif b/image/test/reftest/downscaling/100x100.gif
new file mode 100644
index 0000000000..4ff770d368
Binary files /dev/null and b/image/test/reftest/downscaling/100x100.gif differ
diff --git a/image/test/reftest/downscaling/100x100.jpg b/image/test/reftest/downscaling/100x100.jpg
new file mode 100644
index 0000000000..cea2c240d8
Binary files /dev/null and b/image/test/reftest/downscaling/100x100.jpg differ
diff --git a/image/test/reftest/downscaling/100x100.png b/image/test/reftest/downscaling/100x100.png
new file mode 100644
index 0000000000..eb3cb08e1e
Binary files /dev/null and b/image/test/reftest/downscaling/100x100.png differ
diff --git a/image/test/reftest/downscaling/100x32768.gif b/image/test/reftest/downscaling/100x32768.gif
new file mode 100644
index 0000000000..f55a2f482f
Binary files /dev/null and b/image/test/reftest/downscaling/100x32768.gif differ
diff --git a/image/test/reftest/downscaling/100x32768.jpg b/image/test/reftest/downscaling/100x32768.jpg
new file mode 100644
index 0000000000..e89acc0334
Binary files /dev/null and b/image/test/reftest/downscaling/100x32768.jpg differ
diff --git a/image/test/reftest/downscaling/100x32768.png b/image/test/reftest/downscaling/100x32768.png
new file mode 100644
index 0000000000..7cd5509cf2
Binary files /dev/null and b/image/test/reftest/downscaling/100x32768.png differ
diff --git a/image/test/reftest/downscaling/1404366-1.html b/image/test/reftest/downscaling/1404366-1.html
new file mode 100644
index 0000000000..165cc7f934
--- /dev/null
+++ b/image/test/reftest/downscaling/1404366-1.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html>
+<body>
+<!--
+	1404366-1.ico is an ico file that contains a 32x32 0RGB (0 for all alpha values) bmp
+	where the color values are all white. It also contains a mask. The mask alternates
+	one pixel fully transparent, one pixel fully opaque. The result of drawing this on
+	a white background should be white. This is testing that we premultiply the color
+	values by the alpha derived from the mark when downscaling. If we do not skia will
+	get confused and likely draw non white pixels.
+-->
+<img src="1404366-1.ico" style="width: 12px; height: 12px;">
+</body>
+</html>
\ No newline at end of file
diff --git a/image/test/reftest/downscaling/1404366-1.ico b/image/test/reftest/downscaling/1404366-1.ico
new file mode 100644
index 0000000000..51c020b069
Binary files /dev/null and b/image/test/reftest/downscaling/1404366-1.ico differ
diff --git a/image/test/reftest/downscaling/1421191-1.html b/image/test/reftest/downscaling/1421191-1.html
new file mode 100644
index 0000000000..b8146a2371
--- /dev/null
+++ b/image/test/reftest/downscaling/1421191-1.html
@@ -0,0 +1,20 @@
+<html reftest-zoom="1.6">
+<head>
+<style>
+#xx {
+background-image: url("1421191-1.png");
+background-position: -61px -797px;
+background-position-x: -61px;
+background-position-y: -797px;
+background-repeat: no-repeat;
+background-size: 82px auto;
+display: block;
+height: 24px;
+width: 22px;
+}
+</style>
+</head>
+<body>
+<span id="xx"></span>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/1421191-1.png b/image/test/reftest/downscaling/1421191-1.png
new file mode 100644
index 0000000000..e9b756a79e
Binary files /dev/null and b/image/test/reftest/downscaling/1421191-1.png differ
diff --git a/image/test/reftest/downscaling/32768x100.gif b/image/test/reftest/downscaling/32768x100.gif
new file mode 100644
index 0000000000..2194d13efc
Binary files /dev/null and b/image/test/reftest/downscaling/32768x100.gif differ
diff --git a/image/test/reftest/downscaling/32768x100.jpg b/image/test/reftest/downscaling/32768x100.jpg
new file mode 100644
index 0000000000..807b9adb27
Binary files /dev/null and b/image/test/reftest/downscaling/32768x100.jpg differ
diff --git a/image/test/reftest/downscaling/32768x100.png b/image/test/reftest/downscaling/32768x100.png
new file mode 100644
index 0000000000..3fe4fe1ce5
Binary files /dev/null and b/image/test/reftest/downscaling/32768x100.png differ
diff --git a/image/test/reftest/downscaling/black-border-bottom.png b/image/test/reftest/downscaling/black-border-bottom.png
new file mode 100644
index 0000000000..efa7ce2dce
Binary files /dev/null and b/image/test/reftest/downscaling/black-border-bottom.png differ
diff --git a/image/test/reftest/downscaling/black-border-left.png b/image/test/reftest/downscaling/black-border-left.png
new file mode 100644
index 0000000000..11bc67e983
Binary files /dev/null and b/image/test/reftest/downscaling/black-border-left.png differ
diff --git a/image/test/reftest/downscaling/black-border-rect.svg b/image/test/reftest/downscaling/black-border-rect.svg
new file mode 100644
index 0000000000..0fa01a0a63
--- /dev/null
+++ b/image/test/reftest/downscaling/black-border-rect.svg
@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="-0.5 -0.5 53 43" stroke="#000000">
+  <rect x="0" y="7" width="52" height="35" fill="#ffffff"/>
+</svg>
diff --git a/image/test/reftest/downscaling/black-border-right.png b/image/test/reftest/downscaling/black-border-right.png
new file mode 100644
index 0000000000..081c52d5bc
Binary files /dev/null and b/image/test/reftest/downscaling/black-border-right.png differ
diff --git a/image/test/reftest/downscaling/black-border-top.png b/image/test/reftest/downscaling/black-border-top.png
new file mode 100644
index 0000000000..fc6e69e02a
Binary files /dev/null and b/image/test/reftest/downscaling/black-border-top.png differ
diff --git a/image/test/reftest/downscaling/bmp-size-16x16-24bpp.png b/image/test/reftest/downscaling/bmp-size-16x16-24bpp.png
new file mode 100644
index 0000000000..c04869e728
Binary files /dev/null and b/image/test/reftest/downscaling/bmp-size-16x16-24bpp.png differ
diff --git a/image/test/reftest/downscaling/downscale-1-bigimage.png b/image/test/reftest/downscaling/downscale-1-bigimage.png
new file mode 100644
index 0000000000..5e018590c3
Binary files /dev/null and b/image/test/reftest/downscaling/downscale-1-bigimage.png differ
diff --git a/image/test/reftest/downscaling/downscale-1-ref.html b/image/test/reftest/downscaling/downscale-1-ref.html
new file mode 100644
index 0000000000..63ec56ef7c
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-1-ref.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html>
+<body>
+  <img src="downscale-1-smallimage.png">
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-1-smallimage.png b/image/test/reftest/downscaling/downscale-1-smallimage.png
new file mode 100644
index 0000000000..588e6b78df
Binary files /dev/null and b/image/test/reftest/downscaling/downscale-1-smallimage.png differ
diff --git a/image/test/reftest/downscaling/downscale-1.html b/image/test/reftest/downscaling/downscale-1.html
new file mode 100644
index 0000000000..a9629ef855
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-1.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html class="reftest-wait">
+<head>
+  <script>
+    function snapshot() {
+      document.documentElement.removeAttribute('class');
+    }
+  </script>
+</head>
+<!-- NOTE: Using setTimeout to wait for high-quality downscaled version of
+     image to be ready, because there's nothing better we can do. If we fix
+     Bug 1006883, we can do away with this setTimeout.
+
+     For now, the setTimeout is just here to increase the likelihood that we
+     actually test the high-quality downscaled version of the image. If the
+     setTimeout happens to fire before the high-quality downscaled rendering is
+     ready, then this the test will pass without testing what it's trying to
+     test, which is fine as long as that's rare.  -->
+<body onload="setTimeout(snapshot, 50)">
+  <img src="downscale-1-bigimage.png" style="height: 20px; width: 20px">
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-16px.html b/image/test/reftest/downscaling/downscale-16px.html
new file mode 100644
index 0000000000..06d6db2bf6
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-16px.html
@@ -0,0 +1,28 @@
+<!DOCTYPE HTML>
+<html class="reftest-wait">
+<head>
+<title>Image reftest wrapper</title>
+<style type="text/css">
+  #image1 { background-color: rgb(10, 250, 100); }
+</style>
+<script>
+  // The image is loaded async after the page loads.
+  // Wait for it to finish loading.
+  function onImageLoad() {
+    document.documentElement.removeAttribute("class");
+  };
+</script>
+</head>
+<body>
+<!-- non-empty alt to avoid the broken image icon -->
+<img width="16px" height="16px" id="image1" alt=" ">
+<script>
+  // Use as "wrapper.html?image.png"
+  var imgURL = document.location.search.substr(1);
+  document.images[0].onload = onImageLoad;
+  document.images[0].onerror = onImageLoad;
+  document.images[0].src = imgURL;
+</script>
+</body>
+</html>
+
diff --git a/image/test/reftest/downscaling/downscale-2a.html b/image/test/reftest/downscaling/downscale-2a.html
new file mode 100644
index 0000000000..fac11ccee5
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-2a.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html reftest-zoom="1.0" class="reftest-wait">
+<head>
+  <script>
+    function snapshot() {
+      document.documentElement.removeAttribute('class');
+    }
+  </script>
+</head>
+<!-- NOTE: Using setTimeout to wait for high-quality downscaled version of
+     image to be ready, because there's nothing better we can do. If we fix
+     Bug 1006883, we can do away with this setTimeout.
+
+     For now, the setTimeout is just here to increase the likelihood that we
+     actually test the high-quality downscaled version of the image. If the
+     setTimeout happens to fire before the high-quality downscaled rendering is
+     ready, then this the test will pass without testing what it's trying to
+     test, which is fine as long as that's rare.  -->
+<body style="margin: 0px" onload="setTimeout(snapshot, 50)">
+  <script>
+    var args = location.search.substring(1).split(',');
+    var image = document.createElement('img');
+    image.width = args[0];
+    image.height = args[1];
+    image.src = 'black-border-' + args[2] + '.png';
+    document.body.appendChild(image);
+  </script>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-2b.html b/image/test/reftest/downscaling/downscale-2b.html
new file mode 100644
index 0000000000..af7ecbff33
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-2b.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html reftest-zoom="0.9" class="reftest-wait">
+<head>
+  <script>
+    function snapshot() {
+      document.documentElement.removeAttribute('class');
+    }
+  </script>
+</head>
+<!-- NOTE: Using setTimeout to wait for high-quality downscaled version of
+     image to be ready, because there's nothing better we can do. If we fix
+     Bug 1006883, we can do away with this setTimeout.
+
+     For now, the setTimeout is just here to increase the likelihood that we
+     actually test the high-quality downscaled version of the image. If the
+     setTimeout happens to fire before the high-quality downscaled rendering is
+     ready, then this the test will pass without testing what it's trying to
+     test, which is fine as long as that's rare.  -->
+<body style="margin: 0px" onload="setTimeout(snapshot, 50)">
+  <script>
+    var args = location.search.substring(1).split(',');
+    var image = document.createElement('img');
+    image.width = args[0];
+    image.height = args[1];
+    image.src = 'black-border-' + args[2] + '.png';
+    document.body.appendChild(image);
+  </script>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-2c.html b/image/test/reftest/downscaling/downscale-2c.html
new file mode 100644
index 0000000000..18f70456b1
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-2c.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html reftest-zoom="0.8" class="reftest-wait">
+<head>
+  <script>
+    function snapshot() {
+      document.documentElement.removeAttribute('class');
+    }
+  </script>
+</head>
+<!-- NOTE: Using setTimeout to wait for high-quality downscaled version of
+     image to be ready, because there's nothing better we can do. If we fix
+     Bug 1006883, we can do away with this setTimeout.
+
+     For now, the setTimeout is just here to increase the likelihood that we
+     actually test the high-quality downscaled version of the image. If the
+     setTimeout happens to fire before the high-quality downscaled rendering is
+     ready, then this the test will pass without testing what it's trying to
+     test, which is fine as long as that's rare.  -->
+<body style="margin: 0px" onload="setTimeout(snapshot, 50)">
+  <script>
+    var args = location.search.substring(1).split(',');
+    var image = document.createElement('img');
+    image.width = args[0];
+    image.height = args[1];
+    image.src = 'black-border-' + args[2] + '.png';
+    document.body.appendChild(image);
+  </script>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-2d.html b/image/test/reftest/downscaling/downscale-2d.html
new file mode 100644
index 0000000000..8d9547b73e
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-2d.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html reftest-zoom="0.67" class="reftest-wait">
+<head>
+  <script>
+    function snapshot() {
+      document.documentElement.removeAttribute('class');
+    }
+  </script>
+</head>
+<!-- NOTE: Using setTimeout to wait for high-quality downscaled version of
+     image to be ready, because there's nothing better we can do. If we fix
+     Bug 1006883, we can do away with this setTimeout.
+
+     For now, the setTimeout is just here to increase the likelihood that we
+     actually test the high-quality downscaled version of the image. If the
+     setTimeout happens to fire before the high-quality downscaled rendering is
+     ready, then this the test will pass without testing what it's trying to
+     test, which is fine as long as that's rare.  -->
+<body style="margin: 0px" onload="setTimeout(snapshot, 50)">
+  <script>
+    var args = location.search.substring(1).split(',');
+    var image = document.createElement('img');
+    image.width = args[0];
+    image.height = args[1];
+    image.src = 'black-border-' + args[2] + '.png';
+    document.body.appendChild(image);
+  </script>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-2e.html b/image/test/reftest/downscaling/downscale-2e.html
new file mode 100644
index 0000000000..c3d0d771f3
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-2e.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html reftest-zoom="0.5" class="reftest-wait">
+<head>
+  <script>
+    function snapshot() {
+      document.documentElement.removeAttribute('class');
+    }
+  </script>
+</head>
+<!-- NOTE: Using setTimeout to wait for high-quality downscaled version of
+     image to be ready, because there's nothing better we can do. If we fix
+     Bug 1006883, we can do away with this setTimeout.
+
+     For now, the setTimeout is just here to increase the likelihood that we
+     actually test the high-quality downscaled version of the image. If the
+     setTimeout happens to fire before the high-quality downscaled rendering is
+     ready, then this the test will pass without testing what it's trying to
+     test, which is fine as long as that's rare.  -->
+<body style="margin: 0px" onload="setTimeout(snapshot, 50)">
+  <script>
+    var args = location.search.substring(1).split(',');
+    var image = document.createElement('img');
+    image.width = args[0];
+    image.height = args[1];
+    image.src = 'black-border-' + args[2] + '.png';
+    document.body.appendChild(image);
+  </script>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-2f.html b/image/test/reftest/downscaling/downscale-2f.html
new file mode 100644
index 0000000000..42cfad1f57
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-2f.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html reftest-zoom="0.3" class="reftest-wait">
+<head>
+  <script>
+    function snapshot() {
+      document.documentElement.removeAttribute('class');
+    }
+  </script>
+</head>
+<!-- NOTE: Using setTimeout to wait for high-quality downscaled version of
+     image to be ready, because there's nothing better we can do. If we fix
+     Bug 1006883, we can do away with this setTimeout.
+
+     For now, the setTimeout is just here to increase the likelihood that we
+     actually test the high-quality downscaled version of the image. If the
+     setTimeout happens to fire before the high-quality downscaled rendering is
+     ready, then this the test will pass without testing what it's trying to
+     test, which is fine as long as that's rare.  -->
+<body style="margin: 0px" onload="setTimeout(snapshot, 50)">
+  <script>
+    var args = location.search.substring(1).split(',');
+    var image = document.createElement('img');
+    image.width = args[0];
+    image.height = args[1];
+    image.src = 'black-border-' + args[2] + '.png';
+    document.body.appendChild(image);
+  </script>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-32px-ref.html b/image/test/reftest/downscaling/downscale-32px-ref.html
new file mode 100644
index 0000000000..1caf3c73bf
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-32px-ref.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html>
+<body style="margin: 0px">
+  <img src="lime-red-32px.png">
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-32px.html b/image/test/reftest/downscaling/downscale-32px.html
new file mode 100644
index 0000000000..f5fce324d9
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-32px.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html class="reftest-wait">
+<head>
+  <script>
+    function snapshot() {
+      document.documentElement.removeAttribute('class');
+    }
+  </script>
+</head>
+<!-- NOTE: Using setTimeout to wait for high-quality downscaled version of
+     image to be ready, because there's nothing better we can do. If we fix
+     Bug 1006883, we can do away with this setTimeout.
+
+     For now, the setTimeout is just here to increase the likelihood that we
+     actually test the high-quality downscaled version of the image. If the
+     setTimeout happens to fire before the high-quality downscaled rendering is
+     ready, then this the test will pass without testing what it's trying to
+     test, which is fine as long as that's rare.  -->
+<body style="margin: 0px" onload="setTimeout(snapshot, 50)">
+  <script>
+    var args = location.search.substring(1).split(',');
+    var image = document.createElement('img');
+    image.width = "32";
+    image.height = "32";
+    image.src = 'lime-red-256px' + location.search.substring(1);
+    document.body.appendChild(image);
+  </script>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-8px.html b/image/test/reftest/downscaling/downscale-8px.html
new file mode 100644
index 0000000000..c0586a3657
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-8px.html
@@ -0,0 +1,27 @@
+<!DOCTYPE HTML>
+<html class="reftest-wait">
+<head>
+<title>Image reftest wrapper</title>
+<style type="text/css">
+  #image1 { background-color: rgb(10, 250, 100); }
+</style>
+<script>
+  // The image is loaded async after the page loads.
+  // Wait for it to finish loading.
+  function onImageLoad() {
+    document.documentElement.removeAttribute("class");
+  };
+</script>
+</head>
+<body>
+<!-- non-empty alt to avoid the broken image icon -->
+<img width="8px" id="image1" alt=" ">
+<script>
+  // Use as "wrapper.html?image.png"
+  var imgURL = document.location.search.substr(1);
+  document.images[0].onload = onImageLoad;
+  document.images[0].onerror = onImageLoad;
+  document.images[0].src = imgURL;
+</script>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-moz-icon-1-ref.html b/image/test/reftest/downscaling/downscale-moz-icon-1-ref.html
new file mode 100644
index 0000000000..a7dd5ab8aa
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-moz-icon-1-ref.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html class="reftest-wait">
+<head>
+  <meta charset="utf-8" />
+  <title>Reference for downscaling moz-icon images (bug 1261964)</title>
+  <script>
+    function beginTest() {
+      var canvas = document.getElementById("canvas");
+      var image = new Image();
+
+      image.onload = function() {
+        // When image loads: draw it to canvas, scale down the canvas, and
+        // then let the reftest snapshot happen.
+        // The image can be larger than the requested size, so we resize the
+        // canvas to match it.
+        canvas.width = image.width;
+        canvas.height = image.height;
+        var ctx = canvas.getContext("2d");
+        ctx.drawImage(image, 0, 0);
+        canvas.setAttribute("class", "downscale");
+        document.documentElement.removeAttribute("class");
+      }
+
+      // Kick off the image load:
+      image.src = "moz-icon://bogus-unrecognized-icon?size=100";
+    }
+  </script>
+  <style>
+    body { margin: 0; }
+    .downscale {
+      transform-origin: 0 0;
+      transform: scale(0.9);
+    }
+  </style>
+</head>
+<body onload="beginTest()">
+  <canvas id="canvas"></canvas>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-moz-icon-1.html b/image/test/reftest/downscaling/downscale-moz-icon-1.html
new file mode 100644
index 0000000000..ba37951274
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-moz-icon-1.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html>
+<head>
+  <meta charset="utf-8" />
+  <title>Testcase for downscaling moz-icon images (bug 1261964)</title>
+  <style>
+    body { margin: 0; }
+    .downscale {
+      transform-origin: 0 0;
+      transform: scale(0.9);
+    }
+  </style>
+</head>
+<body>
+  <img class="downscale" src="moz-icon://bogus-unrecognized-icon?size=100">
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-orient-ref.html b/image/test/reftest/downscaling/downscale-orient-ref.html
new file mode 100644
index 0000000000..e32141868f
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-orient-ref.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html class="reftest-wait">
+<head>
+  <script>
+    function snapshot() {
+      document.documentElement.removeAttribute('class');
+    }
+  </script>
+</head>
+<!-- NOTE: Using setTimeout to wait for high-quality downscaled version of
+     image to be ready, because there's nothing better we can do. If we fix
+     Bug 1006883, we can do away with this setTimeout.
+
+     For now, the setTimeout is just here to increase the likelihood that we
+     actually test the high-quality downscaled version of the image. If the
+     setTimeout happens to fire before the high-quality downscaled rendering is
+     ready, then this the test will pass without testing what it's trying to
+     test, which is fine as long as that's rare.  -->
+<body onload="setTimeout(snapshot, 50)">
+  <img src="image-pre-rotated-90-deg.jpg" style="width: 50px; height: 25px;">
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-orient-ref.png b/image/test/reftest/downscaling/downscale-orient-ref.png
new file mode 100644
index 0000000000..0db684e0d7
Binary files /dev/null and b/image/test/reftest/downscaling/downscale-orient-ref.png differ
diff --git a/image/test/reftest/downscaling/downscale-orient.html b/image/test/reftest/downscaling/downscale-orient.html
new file mode 100644
index 0000000000..11b849b27e
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-orient.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html class="reftest-wait">
+<head>
+  <script>
+    function snapshot() {
+      document.documentElement.removeAttribute('class');
+    }
+  </script>
+</head>
+<!-- NOTE: Using setTimeout to wait for high-quality downscaled version of
+     image to be ready, because there's nothing better we can do. If we fix
+     Bug 1006883, we can do away with this setTimeout.
+
+     For now, the setTimeout is just here to increase the likelihood that we
+     actually test the high-quality downscaled version of the image. If the
+     setTimeout happens to fire before the high-quality downscaled rendering is
+     ready, then this the test will pass without testing what it's trying to
+     test, which is fine as long as that's rare.  -->
+<body onload="setTimeout(snapshot, 50)">
+  <img src="../../../../layout/reftests/image/image-exif-90-deg.jpg" style="width: 50px; height: 25px;">
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-png.html b/image/test/reftest/downscaling/downscale-png.html
new file mode 100644
index 0000000000..4752b2155a
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-png.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html reftest-zoom="1.0" class="reftest-wait">
+<head>
+  <script>
+    function snapshot() {
+      document.documentElement.removeAttribute('class');
+    }
+  </script>
+</head>
+<!-- NOTE: Using setTimeout to wait for high-quality downscaled version of
+     image to be ready, because there's nothing better we can do. If we fix
+     Bug 1006883, we can do away with this setTimeout.
+
+     For now, the setTimeout is just here to increase the likelihood that we
+     actually test the high-quality downscaled version of the image. If the
+     setTimeout happens to fire before the high-quality downscaled rendering is
+     ready, then this the test will pass without testing what it's trying to
+     test, which is fine as long as that's rare.  -->
+<body style="margin: 0px" onload="setTimeout(snapshot, 50)">
+  <script>
+    var args = location.search.substring(1).split(',');
+    var image = document.createElement('img');
+    image.width = args[0];
+    image.height = args[1];
+    image.src = 'png-' + args[2] + '.png';
+    document.body.appendChild(image);
+  </script>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-svg-1-ref.html b/image/test/reftest/downscaling/downscale-svg-1-ref.html
new file mode 100644
index 0000000000..8935619ebd
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-svg-1-ref.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html>
+<body style="margin: 0px">
+  <embed src="black-border-rect.svg" style="display: block">
+  <script>
+    var width = location.search.substring(1).split("&");
+    var embedElem = document.getElementsByTagName('embed')[0];
+    embedElem.style.width = width + 'px';
+  </script>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-svg-1a.html b/image/test/reftest/downscaling/downscale-svg-1a.html
new file mode 100644
index 0000000000..2263cc9982
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-svg-1a.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html reftest-zoom="1.0">
+<body style="margin: 0px">
+  <div style="width: 80px; height: 80px; background: url(black-border-rect.svg) no-repeat"></div>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-svg-1b.html b/image/test/reftest/downscaling/downscale-svg-1b.html
new file mode 100644
index 0000000000..9db239c7cd
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-svg-1b.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html reftest-zoom="0.9">
+<body style="margin: 0px">
+  <div style="width: 80px; height: 80px; background: url(black-border-rect.svg) no-repeat"></div>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-svg-1c.html b/image/test/reftest/downscaling/downscale-svg-1c.html
new file mode 100644
index 0000000000..f8babf0267
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-svg-1c.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html reftest-zoom="0.8">
+<body style="margin: 0px">
+  <div style="width: 80px; height: 80px; background: url(black-border-rect.svg) no-repeat"></div>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-svg-1d.html b/image/test/reftest/downscaling/downscale-svg-1d.html
new file mode 100644
index 0000000000..9a56a51de0
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-svg-1d.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html reftest-zoom="0.67">
+<body style="margin: 0px">
+  <div style="width: 80px; height: 80px; background: url(black-border-rect.svg) no-repeat"></div>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-svg-1e.html b/image/test/reftest/downscaling/downscale-svg-1e.html
new file mode 100644
index 0000000000..732ac22c96
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-svg-1e.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html reftest-zoom="0.5">
+<body style="margin: 0px">
+  <div style="width: 80px; height: 80px; background: url(black-border-rect.svg) no-repeat"></div>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/downscale-svg-1f.html b/image/test/reftest/downscaling/downscale-svg-1f.html
new file mode 100644
index 0000000000..0124682c70
--- /dev/null
+++ b/image/test/reftest/downscaling/downscale-svg-1f.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html reftest-zoom="0.3">
+<body style="margin: 0px">
+  <div style="width: 80px; height: 80px; background: url(black-border-rect.svg) no-repeat"></div>
+</body>
+</html>
diff --git a/image/test/reftest/downscaling/ff-0RGB.ico b/image/test/reftest/downscaling/ff-0RGB.ico
new file mode 100644
index 0000000000..56116b9f6a
Binary files /dev/null and b/image/test/reftest/downscaling/ff-0RGB.ico differ
diff --git a/image/test/reftest/downscaling/ff-0RGB.png b/image/test/reftest/downscaling/ff-0RGB.png
new file mode 100644
index 0000000000..749ffcdfb3
Binary files /dev/null and b/image/test/reftest/downscaling/ff-0RGB.png differ
diff --git a/image/test/reftest/downscaling/ff-ARGB.ico b/image/test/reftest/downscaling/ff-ARGB.ico
new file mode 100644
index 0000000000..4681dc6495
Binary files /dev/null and b/image/test/reftest/downscaling/ff-ARGB.ico differ
diff --git a/image/test/reftest/downscaling/ff-ARGB.png b/image/test/reftest/downscaling/ff-ARGB.png
new file mode 100644
index 0000000000..74ea0e2f39
Binary files /dev/null and b/image/test/reftest/downscaling/ff-ARGB.png differ
diff --git a/image/test/reftest/downscaling/huge-1.html b/image/test/reftest/downscaling/huge-1.html
new file mode 100644
index 0000000000..6685600086
--- /dev/null
+++ b/image/test/reftest/downscaling/huge-1.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html><meta charset=utf-8>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<body style="margin: 0px">
+  <script>
+    let args = location.search.substring(1).split(',');
+    document.write(`<img src="${args[0]}" width="${args[1]}" height="${args[2]}">`);
+  </script>
+</body>
diff --git a/image/test/reftest/downscaling/image-pre-rotated-90-deg.jpg b/image/test/reftest/downscaling/image-pre-rotated-90-deg.jpg
new file mode 100644
index 0000000000..b8817f9bf5
Binary files /dev/null and b/image/test/reftest/downscaling/image-pre-rotated-90-deg.jpg differ
diff --git a/image/test/reftest/downscaling/lime-red-256px-bmp-in.ico b/image/test/reftest/downscaling/lime-red-256px-bmp-in.ico
new file mode 100644
index 0000000000..b372cba4a2
Binary files /dev/null and b/image/test/reftest/downscaling/lime-red-256px-bmp-in.ico differ
diff --git a/image/test/reftest/downscaling/lime-red-256px-png-in.ico b/image/test/reftest/downscaling/lime-red-256px-png-in.ico
new file mode 100644
index 0000000000..e8578d2934
Binary files /dev/null and b/image/test/reftest/downscaling/lime-red-256px-png-in.ico differ
diff --git a/image/test/reftest/downscaling/lime-red-256px.bmp b/image/test/reftest/downscaling/lime-red-256px.bmp
new file mode 100644
index 0000000000..3dc808970f
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diff --git a/image/test/reftest/downscaling/lime-red-256px.gif b/image/test/reftest/downscaling/lime-red-256px.gif
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index 0000000000..530ae6d6d5
--- /dev/null
+++ b/image/test/reftest/downscaling/lime-red-256px.svg
@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" version="1.1"
+     width="256" height="256">
+  <rect width="50%" height="100%" fill="lime"/>
+  <rect x="50%" width="50%" height="100%" fill="red"/>
+</svg>
diff --git a/image/test/reftest/downscaling/lime-red-32px.png b/image/test/reftest/downscaling/lime-red-32px.png
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diff --git a/image/test/reftest/downscaling/reftest.list b/image/test/reftest/downscaling/reftest.list
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index 0000000000..226160f3ee
--- /dev/null
+++ b/image/test/reftest/downscaling/reftest.list
@@ -0,0 +1,221 @@
+# Reftests for downscaling
+#
+# Downscaling can be a lossy process, so a bit of mismatch is acceptable here,
+# as long as it's barely noticeable visually. When necessary, this can be
+# explicitly allowed via 'fuzzy'/'fuzzy-if' annotations.
+#
+# Many of these tests check primarily that we don't lose rows or columns of
+# pixels when downscaling by making sure that the result isn't too similar to
+# about:blank. A small amount of fuzziness is used to ensure that the tests
+# don't pass because of very slight deviations; passing tests should be
+# substantially different from about:blank. This fuzziness should *not* be
+# removed as doing so would make the tests pass in situations where they
+# shouldn't.
+#
+# IMPORTANT: For robustness, each test should be listed *twice* in this
+# manifest -- once with the high quality downscaling pref disabled, and once
+# with this pref enabled. The pref is set via "defaults", so
+# simply appending a new test to the lists below each of those lines should be
+# sufficient.
+#
+# Also note that Mac OS X has its own system-level downscaling algorithm, so
+# tests here may need Mac-specific "fuzzy-if(cocoaWidget,...)" annotations.
+# Similarly, modern versions of Windows have slightly different downscaling
+# behavior than other platforms, and may require "fuzzy-if(winWidget,...)".
+
+
+# RUN TESTS NOT AFFECTED BY DOWNSCALE-DURING-DECODE:
+# ==================================================
+fuzzy-if(skiaContent,0-14,0-416) fuzzy-if(webrender&&!geckoview,1-1,2-2) == downscale-svg-1a.html downscale-svg-1-ref.html?80
+fuzzy(0-80,0-468) fuzzy-if(webrender,65-65,468-480) == downscale-svg-1b.html downscale-svg-1-ref.html?72
+fuzzy-if(/^Windows\x20NT\x2010\.0/.test(http.oscpu),0-1,0-62) fuzzy-if(skiaContent,0-8,0-292) fuzzy-if(webrender&&!geckoview,1-1,2-2) == downscale-svg-1c.html downscale-svg-1-ref.html?64
+fuzzy(0-17,0-208) fuzzy-if(webrender,7-7,208-208) == downscale-svg-1d.html downscale-svg-1-ref.html?53
+fuzzy(0-80,0-216) fuzzy-if(skiaContent,0-110,0-181) fuzzy-if(webrender,54-54,178-178) == downscale-svg-1e.html downscale-svg-1-ref.html?40
+fuzzy(0-51,0-90) fuzzy-if(skiaContent,0-142,0-77) fuzzy-if(webrender,64-64,31-31) == downscale-svg-1f.html downscale-svg-1-ref.html?24
+
+# RUN TESTS WITH DOWNSCALE-DURING-DECODE DISABLED:
+# ================================================
+defaults pref(image.downscale-during-decode.enabled,false)
+
+fuzzy-if(winWidget,0-16,0-20) fuzzy-if(cocoaWidget,0-106,0-31) == downscale-1.html downscale-1-ref.html
+
+fuzzy(0-20,0-999) != downscale-2a.html?203,52,left about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?203,52,left about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?203,52,left about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?203,52,left about:blank
+fuzzy(0-20,0-999) != downscale-2e.html?203,52,left about:blank
+
+fuzzy(0-20,0-999) != downscale-2a.html?205,53,left about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?205,53,left about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?205,53,left about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?205,53,left about:blank
+fuzzy(0-20,0-999) != downscale-2e.html?205,53,left about:blank
+
+fuzzy(0-20,0-999) != downscale-2a.html?203,52,right about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?203,52,right about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?203,52,right about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?203,52,right about:blank
+fuzzy(0-20,0-999) != downscale-2e.html?203,52,right about:blank
+
+fuzzy(0-20,0-999) != downscale-2a.html?205,53,right about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?205,53,right about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?205,53,right about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?205,53,right about:blank
+fuzzy(0-20,0-999) != downscale-2e.html?205,53,right about:blank
+
+fuzzy(0-20,0-999) != downscale-2a.html?203,52,top about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?203,52,top about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?203,52,top about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?203,52,top about:blank
+fuzzy(0-20,0-999) != downscale-2e.html?203,52,top about:blank
+
+fuzzy(0-20,0-999) != downscale-2a.html?205,53,top about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?205,53,top about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?205,53,top about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?205,53,top about:blank
+fuzzy(0-20,0-999) != downscale-2e.html?205,53,top about:blank
+
+fuzzy(0-20,0-999) != downscale-2a.html?203,52,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?203,52,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?203,52,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?203,52,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2e.html?203,52,bottom about:blank
+
+fuzzy(0-20,0-999) != downscale-2a.html?205,53,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?205,53,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?205,53,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?205,53,bottom about:blank
+fuzzy(0-20,0-999) fails-if(OSX>=1008&&!skiaContent) != downscale-2e.html?205,53,bottom about:blank
+
+# Skip on Android because it runs reftests via http, and moz-icon isn't
+# accessible from http/https origins anymore.
+fuzzy(0-17,0-3221) fuzzy-if(gtkWidget&&!webrender,4-4,2616-2616) fuzzy-if(gtkWidget&&!webrender&&!layersGPUAccelerated,4-4,2209-2209) fuzzy-if(gtkWidget&&webrender,0-0,0-0) skip-if(Android) == downscale-moz-icon-1.html downscale-moz-icon-1-ref.html # gtkWidget Bug 1592059: regular is 2616, no-accel is 2209, qr passes with 0
+
+== downscale-png.html?16,16,interlaced downscale-png.html?16,16,normal
+== downscale-png.html?24,24,interlaced downscale-png.html?24,24,normal
+
+# Non-transparent and transparent ICO images
+== downscale-16px.html?ff-0RGB.ico downscale-16px.html?ff-0RGB.png
+fuzzy(0-1,0-1) fuzzy-if(gtkWidget&&webrender&&swgl,1-1,1-1) == downscale-16px.html?ff-ARGB.ico downscale-16px.html?ff-ARGB.png
+
+# Upside-down (negative height) BMP
+== downscale-8px.html?top-to-bottom-16x16-24bpp.bmp downscale-8px.html?bmp-size-16x16-24bpp.png
+
+# Test downscaling from all supported formats from 256 to 32.
+== downscale-32px.html?.bmp downscale-32px-ref.html
+== downscale-32px.html?.gif downscale-32px-ref.html
+fuzzy(0-1,0-1024) == downscale-32px.html?.jpg downscale-32px-ref.html
+== downscale-32px.html?.png downscale-32px-ref.html
+== downscale-32px.html?.svg downscale-32px-ref.html
+== downscale-32px.html?-bmp-in.ico downscale-32px-ref.html
+== downscale-32px.html?-png-in.ico downscale-32px-ref.html
+
+# Test downscaling a JPEG with orientation metadata.
+pref(layout.css.image-orientation.initial-from-image,true) fuzzy(0-1,0-50) == downscale-orient.html downscale-orient-ref.html
+
+# RUN TESTS WITH DOWNSCALE-DURING-DECODE ENABLED:
+# ===============================================
+defaults pref(image.downscale-during-decode.enabled,true)
+
+fuzzy(0-31,0-127) fuzzy-if(d2d,0-31,0-147) == downscale-1.html downscale-1-ref.html # intermittently 147 pixels on win7 accelerated only (not win8)
+
+fuzzy(0-20,0-999) != downscale-2a.html?203,52,left about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?203,52,left about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?203,52,left about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?203,52,left about:blank
+fuzzy(0-20,0-999) != downscale-2e.html?203,52,left about:blank
+fuzzy(0-20,0-999) != downscale-2f.html?203,52,left about:blank
+
+fuzzy(0-20,0-999) != downscale-2a.html?205,53,left about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?205,53,left about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?205,53,left about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?205,53,left about:blank
+fuzzy(0-20,0-999) != downscale-2e.html?205,53,left about:blank
+fuzzy(0-20,0-999) != downscale-2f.html?205,53,left about:blank
+
+fuzzy(0-20,0-999) != downscale-2a.html?203,52,right about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?203,52,right about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?203,52,right about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?203,52,right about:blank
+fuzzy(0-20,0-999) != downscale-2e.html?203,52,right about:blank
+fuzzy(0-20,0-999) != downscale-2f.html?203,52,right about:blank
+
+fuzzy(0-20,0-999) != downscale-2a.html?205,53,right about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?205,53,right about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?205,53,right about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?205,53,right about:blank
+fuzzy(0-20,0-999) != downscale-2e.html?205,53,right about:blank
+fuzzy(0-20,0-999) != downscale-2f.html?205,53,right about:blank
+
+fuzzy(0-20,0-999) != downscale-2a.html?203,52,top about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?203,52,top about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?203,52,top about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?203,52,top about:blank
+fuzzy(0-20,0-999) != downscale-2e.html?203,52,top about:blank
+fuzzy(0-20,0-999) != downscale-2f.html?203,52,top about:blank
+
+fuzzy(0-20,0-999) != downscale-2a.html?205,53,top about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?205,53,top about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?205,53,top about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?205,53,top about:blank
+fuzzy(0-20,0-999) != downscale-2e.html?205,53,top about:blank
+fuzzy(0-20,0-999) != downscale-2f.html?205,53,top about:blank
+
+fuzzy(0-20,0-999) != downscale-2a.html?203,52,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?203,52,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?203,52,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?203,52,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2e.html?203,52,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2f.html?203,52,bottom about:blank
+
+fuzzy(0-20,0-999) != downscale-2a.html?205,53,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2b.html?205,53,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2c.html?205,53,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2d.html?205,53,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2e.html?205,53,bottom about:blank
+fuzzy(0-20,0-999) != downscale-2f.html?205,53,bottom about:blank
+
+# Skip on WinXP with skia content
+# Skip on Android because it runs reftests via http, and moz-icon isn't
+# accessible from http/https origins anymore.
+fuzzy(0-53,0-6391) fuzzy-if(gtkWidget&&webrender,18-19,5502-5568) fails-if(/^Windows\x20NT\x205\.1/.test(http.oscpu)) skip-if(Android) == downscale-moz-icon-1.html downscale-moz-icon-1-ref.html # gtkWidget Bug 1592059
+
+== downscale-png.html?16,16,interlaced downscale-png.html?16,16,normal
+== downscale-png.html?24,24,interlaced downscale-png.html?24,24,normal
+
+# Non-transparent and transparent ICO images
+fuzzy(0-1,0-3) == downscale-16px.html?ff-0RGB.ico downscale-16px.html?ff-0RGB.png
+fuzzy(0-3,0-32) fuzzy-if(webrender&&swgl,3-3,33-33) == downscale-16px.html?ff-ARGB.ico downscale-16px.html?ff-ARGB.png
+
+# Upside-down (negative height) BMP
+== downscale-8px.html?top-to-bottom-16x16-24bpp.bmp downscale-8px.html?bmp-size-16x16-24bpp.png
+
+# Test downscaling from all supported formats from 256 to 32.
+fuzzy(0-18,0-128) == downscale-32px.html?.bmp downscale-32px-ref.html
+fuzzy(0-18,0-128) == downscale-32px.html?.gif downscale-32px-ref.html
+fuzzy(0-19,0-992) == downscale-32px.html?.jpg downscale-32px-ref.html
+fuzzy(0-18,0-128) == downscale-32px.html?.png downscale-32px-ref.html
+== downscale-32px.html?.svg downscale-32px-ref.html
+fuzzy(0-18,0-128) == downscale-32px.html?-bmp-in.ico downscale-32px-ref.html
+fuzzy(0-18,0-128) == downscale-32px.html?-png-in.ico downscale-32px-ref.html
+
+# Test downscaling a JPEG with orientation metadata.
+pref(layout.css.image-orientation.initial-from-image,true) fuzzy(0-4,0-18) == downscale-orient.html downscale-orient-ref.html
+
+# Test images taller or wider than 32767 pixels.
+== huge-1.html?100x32768.png,100,100 huge-1.html?100x100.png,100,100
+== huge-1.html?100x32768.png,100,32768 huge-1.html?100x100.png,100,32768
+== huge-1.html?32768x100.png,100,100 huge-1.html?100x100.png,100,100
+== huge-1.html?32768x100.png,32768,100 huge-1.html?100x100.png,32768,100
+== huge-1.html?100x32768.gif,100,100 huge-1.html?100x100.gif,100,100
+== huge-1.html?100x32768.gif,100,32768 huge-1.html?100x100.gif,100,32768
+== huge-1.html?32768x100.gif,100,100 huge-1.html?100x100.gif,100,100
+== huge-1.html?32768x100.gif,32768,100 huge-1.html?100x100.gif,32768,100
+== huge-1.html?100x32768.jpg,100,100 huge-1.html?100x100.jpg,100,100
+== huge-1.html?100x32768.jpg,100,32768 huge-1.html?100x100.jpg,100,32768
+== huge-1.html?32768x100.jpg,100,100 huge-1.html?100x100.jpg,100,100
+== huge-1.html?32768x100.jpg,32768,100 huge-1.html?100x100.jpg,32768,100
+
+# Only need to run these with downscaling on
+!= 1421191-1.html about:blank
+== 1404366-1.html about:blank
diff --git a/image/test/reftest/downscaling/top-to-bottom-16x16-24bpp.bmp b/image/test/reftest/downscaling/top-to-bottom-16x16-24bpp.bmp
new file mode 100644
index 0000000000..bd18f85d48
Binary files /dev/null and b/image/test/reftest/downscaling/top-to-bottom-16x16-24bpp.bmp differ
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